Sash-balance.



H. A HANNUM.

Patented Feb. 6, I900.

SASH BALANCE.

(Application filed Apr. 13, 1899.)

2 Sheets-Sheet I.

(No Model.)

' NV N R ATTORNEY WITNESSES: awA-mu No. 642,865. Patented Feb. 6, I900.

H. A. HANNUM.

SASH BALANCE.

(Application filed. Apr. 13, 1899.)

(No Model.) 2 sheets-Sheet 2.

WITNESISES: INYENTOR 7? 3*. x j AATTO EY NlTED STATES PATENT OFFICE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 642,865, dated February 6, 1900.

Application filed April 1 3, 1 89 9.

To all whom it may concern.-

Be it known that I, HENRY A. HANNUM, of Oazenovia, in the county of Madison, in the State of New York, have invented new and useful Improvements in Sash Balances, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to an improvement in a sash-balance for windows, and more particularly to that class comprising a pulley fastened to the window-jamb and a cord running over said pulley and connected at one end to the window-sash and provided on its free end with a counterweight. In said prior constructions it has been found necessary to provide vertical boxes or casings back of the window-jambs for the reception of the weights.

The object of this invention is to provide a sash-balance which shall dispense with the aforesaid boxes or cases, and thus reduce the cost of construction of the window-casings, and which sash balance shall be convenient and efficient in operation and permit the sash to be readily removed from the window when required for cleaning the window or for setting the glass in the sash or other purposes.

The object of the invention is also to provide simple and efficient means for locking and at the same timetightening the window, so as to prevent its rattling and to exclude air and dust from the joints between the sash and casing.

Furthermore, the object is to provide a sashbalance which shall be adjustable to permit the upper and lower sashes to. be raised and lowered either simultaneously or separately, as maybe desired; and the invention consists in the novel detail of construction and combination of parts, as hereinafter more fully described, and set forth in the claims.

In the annexed drawings, Figure 1 is an inner face view of a window and its jamb equipped with my improved sash-balance. Fig. 2 is an enlarged vertical section on line X X in Fig. 1. Fig. 3 is an enlarged side edge view of the lower sash. Fig. 4 is an enlarged detail view of a portion of the window- ;jamb on which the pulley is sustained. Fig. 5 is a further enlarged detail face view of aportion of the lower sash and window-jamb, illusserial No. 712,859. (No model.)

trating the clamp which engages the cord and also illustrating the locking device. Fig. 6 is a plan view of same. Fig. 7 is a longitudinal section on line Y Y in Fig. 6, and Fig. 8 is an end view of the bracket which supports the aforesaid clamp and locking-bolt.

Similar letters of reference indicate corresponding parts.

A represents the window-jamb, and B B represent the upper and lower sashes of the window, respectively. Upon the sash B are secured two brackets a Ct, which brackets consist of angular base-plates a a fastened to the top and side edges of the lower sash to reinforce the corners of the sash, and are preferably countersunk at theside edge to bring the same flush withsaid sash, as clearly shown in' Fig. 5 of the drawings.

Upon the upper part of the jamb A is sustained a pulley 0, preferably by means of a bracket 0. To the upper portion of the side edge of the sash B is attached the upper end of a cord d, which cord passes over the pulley C and downward through a vertical eye e, formed in the bracket a. Upon said bracket and between the vertical clamp-supports a is pivoted the clamp f, which consists of an eccentric adapted to grip the cord and press the same into a serration g, formed in the eye 6, whereby said cord is adj ustably connected to said bracket, said eccentric having a lever formed integral therewith for operating the same.

By the connection of the cord to both sashes said sashes are caused to balance each other, and in the operation of raising the lower sash the upper sash is automatically lowered, and vice versa.

Each side edge of the lower sash B is provided with a vertical groove h, extending the entire length of said edge to accommodate the lower end portion of the cord 01. To the lower extremity of the cord 01 beneath the bracket is secured a weight t for the purpose of maintaining the cord taut when released from the clamps. Said weight consists, preferably, of a metal tube embracing the cord and preferably secured thereto by means of a screw 7', as clearly shown in Fig. 7 of the drawings.

On each of the brackets a is formed a llOIlzontal guide a, containing a main sliding bolt 1), formed with a thumb-piece 12 which has a horizontal base sliding on the base-plate a and thereby prevents the bolt from turning in the guide a. Said bolt is beveled or wedge-shaped and is adapted to enter into one of the sockets 0, formed in the jamb A, whereby the sashes can be securely locked in their desired positions. The aforesaid sockets are provided with metal bushings c c for the reception of the beveled or wedge-shaped end portion of the bolt 5. In the operation of pushing the said bolt into the bushing the lower sash is wedged outward against the upper sash and the latter is pressed against the outer jamb, and consequently the window is tightened to prevent rattling and to exclude air, rain, and dust.

Upon each of the plates 0. is provided a stop d which is employed for the purpose of preventing the main locking-bolt b from becoming entirely withdrawn from the guide a. Said stop consists, preferably, of the head of one of the screws which fasten the base-plate a to the sash 13'.

It will be observed that in order to drop or raise the upper sash independent of the lower sash the clamps f f are operated to release the cords d d, thereby disconnecting the upper sash from the lower sash. In operating the aforesaid clamps ff there is a possibility of losing control of the upper sash, in which case the same would drop down against the window-sill with great force, which is liable to break the glass and also subject the various parts to great strain and jar. Therefore to overcome such strain and jar incident to the aforesaid falling of the sash I have provided a cushion e preferably formed of a spiral spring surrounding the cord cl and resting upon the aforesaid weight, which spring is adapted to strike with its upper end against the under side of the bracket a when the cord is drawn up by reason of the aforesaid dropping of the upper sash, said cushion serving to gradually arrest the descent of the upper sash to prevent the concussion of the sash with the window-sill.

In order to allow the upper sash to be retained in its raised position while raising and lowering the lower sash, I provide the side portion of the upper sash with a supplemental locking-bolt 9 which is adapted to engage a recess or socket in the jamb A, and thereby lock the sash B to the window-jamb, thus preventing the upper sash from dropping when the cord is released from the clamp f, which release disconnects the two sashes, the cords in the meantime being held taut by the weights 6 i hereinbefore described.

Referring to Fig. 4 of the drawings, it will be observed that the pulley O is located at sufficient proximity to the top jamb O to cause said jamb to form a guard over the pulley to prevent the cord from accidentally leaving the pulley. Said j amb also forms a partiallychoked side entrance, as indicated at f through which entrance the cord (Z is forced in placing the same on or removing it from the pulley when required.

By providing the window-jamb with a plurality of sockets c at different points in the height thereof and in positions to admit the locking-bolt b the lower sash can be locked in a partially-open position, and when the upper sash is tied to the lower sash by the clamped sash-cords said upper sash becomes also locked in a partially-open position simultaneously with the aforesaid locking of the lower sash.

I do not limit myself to the use of the herein-described cord-clamping devices, as it is obvious that they are susceptible of modifications in their construction and arrangement. Neither do I limit myself to the use of such cords extending through the grooves in the side edges of the lower sash, inasmuch as said cords may be terminated at or near the top of the lower sash and have fastened to them rods extending downward through the aforesaid grooves, the cords in such case be ing merely of sufficient length to allow the necessary travel on the pulleys in raising and lowering the sash.

What I claim is 1. The combination with a window-jamb having sockets therein, and the upper and lower sashes, of a sliding bolt carried by the lower sash and designed to engage the sockets in the jamb so as to lock the sash in adjusted position, said bolt and sockets being relatively formed to wedge the lower sash against the upper sash and the upper sash against the jamb, substantially as set forth.

2. The combination with the socketed window-jamb, the upper and lower sashes, a pulley sustained on the Window-jamb, and a weighted sash-cord attached at one end to the upper sash and extending over said pulley, of an angular bracket secured to the corner of the lower sash and having its horizontal member constructed to provide a horizontal tubular guide and vertical clamp-supports arranged side by side 011 its base-plate, and its vertical member constructed to form a vertical eye for the sash-cord, communicating with the space between said clamp-supports, a clamping-lever pivoted between said clamping-supports,and opposed to a wall of said eye, and a sliding bolt extending through said tubular guide and designed to engage the sockets in the jamb, substantially as described.

3. The combination with a socketed windowj amb, and the window-sashes, of a bracket secured to one sash and having a tubular guide, a sliding bolt extending through said guide and formed with a thumb-piece havinga horizontal lower end engaging the bracket and preventing the bolt from turning, the inner end of said bolt being designed to engage the sockets in the jamb and of such relative construction thereto as not only to lock the sash but also to wedge one sash against the other and said other against the j amb, substantially as described.

4. The combination Withasocketed windowsash will be forced against the other sash and 10 jamb, and thewindow-sashes, of abracket sesaid other sash will be forced against the cured to one sash and having a guide, a slidjamb, substantially as described and for the ing bolt extending through said guide, and purposes specified.

5 means for preventing axial movement of the bolt in itsguide while permitting longitudinal HENRY HANNUM' movement thereof, the end of said bolt being Witnesses: constructed to have a wedging engagement J J. LAAss, with the socket in the jamb, whereby one H. B. SMITH. 

